.\" netsniff-ng - the packet sniffing beast .\" Copyright 2013 Daniel Borkmann. .\" Subject to the GPL, version 2. .TH FLOWTOP 8 "03 March 2013" "Linux" "netsniff-ng toolkit" .SH NAME flowtop \- top-like netfilter TCP/UDP/SCTP/DCCP/ICMP(v6) flow tracking .PP .SH SYNOPSIS .PP \fBflowtop\fR { [\fIoptions\fR] } .PP .SH DESCRIPTION .PP flowtop is a top-like connection tracking tool that can run on an end host or small home router. It is able to present TCP, UDP/UDP-lite, SCTP, DCCP, and ICMP(v6) flows that have been collected by the kernel's netfilter connection tracking framework, thus no packet capturing in user space needs to be done. .PP flowtop is able to give you a quick overview of current connections on your local system, e.g. for debugging purposes or to answer questions like: .PP * If you access website X, what other connections are being opened in the background that I'm not aware of? * What connections are active that pass one's router? * I have this proprietary binary Y, to where does it connect? * To which countries am I sending data? * Are there any suspicious background connections on my machine? * How many active connections does binary Y have? .PP The following information will be presented in flowtop's output: .PP * Application name and PID when run on local machine * Reverse DNS for source and destination * Geo-location information (country, city) * Used protocols (IPv4, IPv6, TCP, UDP, SCTP, ICMP, ...) * Flow port's service name heuristic * Transport protocol state machine information .PP In order for flowtop to work, netfilter must be active and running on your machine, thus kernel-side connection tracking is active. .PP flowtop's intention is just to get a quick look over your active connections. If you want logging support, have a look at netfilter's conntrack(8) tools instead. .PP .SH OPTIONS .PP .SS -4, --ipv4 Display IPv4 flows. That is the default when flowtop is started without any arguments. .PP .SS -6, --ipv6 Display IPv6 flows. That is the default when flowtop is started without any arguments. .PP .SS -T, --tcp Display TCP flows. That is the default when flowtop is started without any arguments. .PP .SS -U, --udp Display UDP and UDP-lite flows. .PP .SS -D, --dccp Display DCCP flows. .PP .SS -I, --icmp Display ICMP version 4 and version 6 flows. .PP .SS -S, --sctp Display SCTP flows. .PP .SS -s, --show-src Also show source information of the flow, not only destination information. .PP .SS -u, --update The built-in database update mechanism will be invoked to get Maxmind's latest database. To configure search locations for databases, the file /etc/netsniff-ng/geoip.conf contains possible addresses. Thus, to save bandwidth or for mirroring Maxmind's databases (to bypass their traffic limit policy), different hosts or IP addresses can be placed into geoip.conf, separated by a newline. .PP .SS -v, --version Show version information and exit. .PP .SS -h, --help Show user help and exit. .PP .SH USAGE EXAMPLE .PP .SS flowtop Default ncurses output for flowtop that tracks IPv4, IPv6 flows for TCP. .PP .SS flowtop -46UTDISs This example enables the maximum display options for flowtop. .PP .SH CONFIG FILES .PP Files under /etc/netsniff-ng/ can be modified to extend flowtop's service resolution and lookup information. .PP * tcp.conf - TCP port/services map * udp.conf - UDP port/services map * geoip.conf - GeoIP database mirrors .PP .SH BUGS With a fairly high rate of connection tracking updates, flowtop can become unresponsive for short periods of time while scrolling. The right fix would be to replace flowtop's connection management backend with a better design with respect to the locking approach. This is still on the "todo" list. .PP .SH LEGAL flowtop is licensed under the GNU GPL version 2.0. .PP .SH HISTORY .B flowtop was originally written for the netsniff-ng toolkit by Daniel Borkmann. It is currently maintained by Tobias Klauser and Daniel Borkmann . .PP .SH SEE ALSO .BR netsniff-ng (8), .BR trafgen (8), .BR mausezahn (8), .BR ifpps (8), .BR bpfc (8), .BR astraceroute (8), .BR curvetun (8) .PP .SH AUTHOR Manpage was written by Daniel Borkmann. .PP .SH COLOPHON This page is part of the Linux netsniff-ng toolkit project. A description of the project, and information about reporting bugs, can be found at http://netsniff-ng.org/. alds@linux-foundation.org>2016-12-13 16:07:55 -0800 commitaa3ecf388adc90bde90776bba71a7f2d278fc4e3 (patch) treeeab9a54822048f3cb4a280ab70d3eaea3c1c4e14 parentb5cab0da75c292ffa0fbd68dd2c820066b2842de (diff)parent709613ad2b3c9eaeb2a3e24284b7c8feffc17326 (diff)
Merge tag 'for-linus-4.10-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
Pull xen updates from Juergen Gross: "Xen features and fixes for 4.10 These are some fixes, a move of some arm related headers to share them between arm and arm64 and a series introducing a helper to make code more readable. The most notable change is David stepping down as maintainer of the Xen hypervisor interface. This results in me sending you the pull requests for Xen related code from now on" * tag 'for-linus-4.10-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip: (29 commits) xen/balloon: Only mark a page as managed when it is released xenbus: fix deadlock on writes to /proc/xen/xenbus xen/scsifront: don't request a slot on the ring until request is ready xen/x86: Increase xen_e820_map to E820_X_MAX possible entries x86: Make E820_X_MAX unconditionally larger than E820MAX xen/pci: Bubble up error and fix description. xen: xenbus: set error code on failure xen: set error code on failures arm/xen: Use alloc_percpu rather than __alloc_percpu arm/arm64: xen: Move shared architecture headers to include/xen/arm xen/events: use xen_vcpu_id mapping for EVTCHNOP_status xen/gntdev: Use VM_MIXEDMAP instead of VM_IO to avoid NUMA balancing xen-scsifront: Add a missing call to kfree MAINTAINERS: update XEN HYPERVISOR INTERFACE xenfs: Use proc_create_mount_point() to create /proc/xen xen-platform: use builtin_pci_driver xen-netback: fix error handling output xen: make use of xenbus_read_unsigned() in xenbus xen: make use of xenbus_read_unsigned() in xen-pciback xen: make use of xenbus_read_unsigned() in xen-fbfront ...
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